Numerical simulation and experimental investigation of performance characteristics of water-lubricated radial journal bearing

2011 ◽  
Author(s):  
Tang Qunguo ◽  
Jin Wenhao ◽  
Sun Xudong ◽  
Chen Jingtian
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Journal Bearing ◽  
Performance Characteristics

An Experimental Investigation of the Effect of Misalignment and Directionality on the Performance of an Externally-Pressurized, Orifice-Compensated Air Journal Bearing

1979 ◽  
Vol 101 (1) ◽  
pp. 28-37 ◽  
Author(s):  
P. H. Markho ◽  
S. S. Grewal ◽  
T. B. Stowell
Keyword(s):  
Experimental Investigation ◽  
Journal Bearing ◽  
Diameter Ratio ◽  
Performance Characteristics ◽  
Double Plane ◽  
Order Of Magnitude ◽  
Length To Diameter Ratio

The study described in this paper aims to quantify the effects of misalignment and directionality on the important performance characteristics of a double-plane admission bearing having a length to diameter ratio of unity. The results clearly demonstrate that misalignment does not seriously impair the bearing performance, as long as due allowance is made for its effect on clearance at the bearing ends. In practice, this impairment would rarely exceed 10 percent. The effect of directionality is also found to be of the same order of magnitude.

Numerical Simulation & Experimental Investigation of SMT Laser Microsoldering Thermal Process

1991 ◽  
Vol 226 ◽  
Author(s):  
Wang Chunqing ◽  
Qian Yiyu ◽  
Jiang Yihong
Keyword(s):  
Thermal Conductivity ◽  
Numerical Simulation ◽  
Experimental Investigation ◽  
Thermal Process ◽  
Light Wave ◽  
Light Reflection ◽  
Lead Wire ◽  
Wire Surface ◽  
Conductivity Variation ◽  
Thermal Conductivity Variation

AbstractIn this paper,a numerical simulation of thermal process in the SMT laser microsoldering joint has been developed, in which, the influence on thermal process of the factors such as the thermal conductivity variation of solder with temperature, light reflection coefficient of the lead wire surface, and heat exchange on the surface of SMT materials all have been considered. In order to carry this numerical calculation practice and prove it's results,the reflexive characteristic of light wave to the SMT materials has been gauged,and the dynamic temperature process of laser microjoint has been measured by a new experimental method which was invented by the authors.The results of numerical simulation have been borne out by the tests, and the influences of heating parameters on thermal process has been analysed in this paper.The conclusions will be advantageous to the further study of the microjoint quality control in the SMT laser microsoldering.

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